'Farmer' in the Bible

Does a farmer just keep on plowing at planting time? Does he keep breaking up and harrowing his ground?

Yes, the Lord has this to say to the people of Judah and Jerusalem: "Like a farmer breaking up hard unplowed ground, you must break your rebellious will and make a new beginning; just as a farmer must clear away thorns lest the seed is wasted, you must get rid of the sin that is ruining your lives.

Instead he will say, 'I am no prophet -- indeed, I am a farmer, for a man has made me his indentured servant since my youth.'